Some folder restructuring to help with route loading states (#14022)

* initial reshuffle to use outlet and remove dashboard and index replace with higher level parent clients

* loading

* clean up

* test clean up

* clean up

ui/app/router.js

@@ -18,6 +18,7 @@ Router.map(function () {
       this.mount('open-api-explorer', { path: '/api-explorer' });
       this.route('license');
       this.route('clients', function () {
+        this.route('current');
         this.route('history');
         this.route('config');
         this.route('edit');